Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 22-01-2023 and time 16:19:57 (UTC) in region 7 km NW Posta (RI)

A magnitude ML 1.2 earthquake occured in region: 7 km NW Posta (RI), on

  • 22-01-2023 16:19:57 (UTC)
  • 22-01-2023 17:19:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5760, 13.0580 at 16 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Posta RI 7 694 694
Leonessa RI 8 2435 3129
Borbona RI 9 617 3746
Cittareale RI 10 482 4228
Monteleone di Spoleto PG 12 599 4827
Micigliano RI 14 127 4954
Poggio Bustone RI 16 2055 7009
Cascia PG 16 3217 10226
Montereale AQ 16 2581 12807
Cantalice RI 17 2755 15562
Polino TR 18 233 15795
Antrodoco RI 18 2588 18383
Rivodutri RI 18 1253 19636
Poggiodomo PG 18 117 19753
Cagnano Amiterno AQ 19 1369 21122
Borgo Velino RI 19 972 22094
Morro Reatino RI 19 373 22467
Amatrice RI 20 2657 25124

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Terni (111501 inhabitants)
37 Km NW of L'Aquila (69753 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
54 Km W of Teramo (54892 inhabitants)
70 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km NE of Tivoli (56533 inhabitants)
80 Km E of Viterbo (67173 inhabitants)
81 Km SE of Perugia (166134 inhabitants)
89 Km NE of Roma (2864731 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 Km W of Chieti (51815 inhabitants)
96 Km W of Pescara (121014 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.2 2023-01-22
16:19:57		 42.5757 13.0585 16 2023-01-22
16:50:49		 Sala Sismica INGV-Roma 113733301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-22 16:19:57 ± 0.22
Latitude 42.5757 ± 0.0108
Longitude 13.0585 ± 0.0110
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 113733301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1109
Semi-minor axis of confidence ellipse (meter) 824
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 326
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 239
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.03058
Epicentral distance of station farthest from the epicenter (degree) 0.35433
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 113733301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-22 16:50:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
7F.SIB1.EHZ. 2023-01-22T16:20:10.51 0.3 undecidable manual S 26 39.3273 100 0.38 66
IV.MC2.EHZ. 2023-01-22T16:20:10.88 1.0 undecidable manual S 16 38.7279 101 0.91 18
IV.MTRA.HNZ. 2023-01-22T16:20:08.45 0.6 undecidable manual S 54 34.1436 103 -0.31 44
IV.NRCA.HHZ. 2023-01-22T16:20:07.23 0.6 undecidable manual S 9 28.9488 106 -0.2 46
IV.SMA1.EHZ. 2023-01-22T16:20:06.22 0.6 undecidable manual S 75 23.3544 112 0.2 47
IV.GAVE.EHZ. 2023-01-22T16:20:04.72 0.6 undecidable manual S 314 18.6702 119 -0.15 48
IV.MC2.EHZ. 2023-01-22T16:20:04.59 0.1 undecidable manual P 16 38.7279 101 0.08 94
7F.SIB1.EHZ. 2023-01-22T16:20:04.53 0.1 undecidable manual P 26 39.3273 100 -0.07 93
IV.MTRA.HNZ. 2023-01-22T16:20:03.55 0.1 undecidable manual P 54 34.1436 103 -0.26 90
IV.SMA1.EHZ. 2023-01-22T16:20:02.44 0.3 positive manual P 75 23.3544 112 0.21 70
IV.LNSS.HHZ. 2023-01-22T16:20:02.14 0.6 undecidable manual S 334 3.3966 166 -0.16 49
IV.NRCA.HHZ. 2023-01-22T16:20:02.89 0.1 negative manual P 9 28.9488 106 -0.15 93
IV.GAVE.EHZ. 2023-01-22T16:20:01.63 0.1 undecidable manual P 314 18.6702 119 0.06 96
IV.LNSS.HHZ. 2023-01-22T16:20:00.09 0.1 undecidable manual P 334 3.3966 166 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.1 0.00013350000000000002 0.36 AML other m 2023-01-22T16:20:02.38
IV.LNSS.HHE. ML:1.1 0.0001365 1.58 AML other m 2023-01-22T16:20:02.19
IV.SMA1.EHE. ML:1.4 0.0001545 0.42 AML other m 2023-01-22T16:20:06.48
IV.SMA1.EHN. ML:1.5 0.00016849999999999998 0.36 AML other m 2023-01-22T16:20:06.70
IV.NRCA.HHE. ML:1.2 0.0000747 1.02 AML other m 2023-01-22T16:20:07.01
IV.NRCA.HHN. ML:1.2 0.0000633 1.24 AML other m 2023-01-22T16:20:07.92
IV.GAVE.EHE. ML:1.0 0.00005818386 0.1408 AML other m 2023-01-22T16:20:05.97
IV.GAVE.EHN. ML:0.8 0.000037711855000000004 0.1408 AML other m 2023-01-22T16:20:06.30
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download